1974
March : Founded with registered capital of 15 Million Baht
May : Office establishment

1975
September : Started production of Urea-Melamine Formaldehyde Resin
October : Started production of Alkyd Resin

1976
September : Started production of Melamine Resin, Started production of Unsaturated Polyester Resin.

1977
June : Increased capital to 30 Million Baht

1978
April : Installed Reaction kettle for expansion

1979
December : Started production of Polyamide Resin for coating and epoxy glue

1980
Febuary : Started Production of Polyurethane Resin for Synthetic leather

1981
April : Started Production of Acrylic Resin

1982
November : Reached 1,000 MT/month Sales volume

1984
November : Started production of Polyurethane Resin for shoes sole

1987
August : Completion of Technical Center in the factory

1988
January : Installed the New Reaction kettle (expanding to 1,500 MT/month)

1989
August : Installed the New Reaction Kettle ( expanding to 1,800 MT/month)
November : Contructed the second Plant

1990
March : Started Production of Phenolic Resin
December : Incerased Capital to 60 Million Baht, Started Production of Plasticizer

1991
May : Increased Capital to 90 Million Baht
December : Increased Capital to 120 Million Baht

1992
January : Completion of the third Plant, Started production of Emulsion Polymer

1993
August : Completion of restructure for the first Plant
December : Production capacity reached 5800 MT/month after expansion

1994
April : Completion of Technical Center expansion
August : Completion of the 4th Plant Building
December : Started Production of Powder Coating resin

1996
January : Started production of Bulk Molding Compound

1997
March : Implemented for Quality System ISO 9002

1998
December : Received Quality System ISO 9002

2001
Certified ISO 9001:2000 (Quality Management System)

2003
Certified ISO 14001:1996 (Environmental Management System)

2004
Certified OHSAS 18001:1999 (Occupational Health Safety System) and TIS 18001:1999 (Thai Industrial Standard for Occupational Health Safety System)

2006
Integrated 3 management systems (ISO 9001 & ISO 14001 & TIS/OHSAS 18001):QEHS

2011
Began to produce Epoxy Dispersion (EP)

2012
Received a plaque for social responsibility, CSR-DIW and certification in industrial business operations that adhere to environmentally friendly business practices, Green Industry Level 3 from the Department of Industrial Works, Ministry of Industry, Thailand.

2013
Received a plaque for continually showing social responsibility, CSR-DIW Continuous from the Department of Industrial Works, Ministry of Idustry, Thailand.

2015
Established Polymer Technical Center Asia Pacific (PTCAP) Awarded the winner of the DIC Group for its CSR activities from DIC Corporation.

2016
Changed trade name of melamine resin to be AMIDIR and alkyd resin to be ALUKIDIR Installed pilot reactor 0.5 tons for polyester resin

2017
Completed to install Solar Cell total 6,696 m² with generating 700kW of electricity. Set up safety training room 'Safety Dojo' Established Siam Chemical Memorial Scholarship for various universities. Certified Green Industry Level 4, ISO 9001:2015 and ISO 14001:2015

2018
Received a plaque for waste management '3Rs' from the Department of Industrial Works, Ministry of Industry, Thailand. Changed trade name of unsaturated polyester resins to be SUNDHOMA and UV curable resin to be LUXYDIR

2019
Completed to install 38 tons for polyester resins and production capacity rose to 80,000 ton/year. Certified ISO 45001:2018 (Occupational Health and Safety Management Systems).

2020
Melt PA Flake tank and Auto packing line installation.

2021
Thin film evaporator installation to recover used solvent.

2025
Siam Chemical Industry changed company name to DIC Siam Chemical Industry